pip install --upgrade django
[..]
You have just installed Django over top of an existing
installation, without removing it first. Because of this,
your install may now include extraneous files from a
previous version that have since been removed from
Django. This is known to cause a variety of problems. You
should manually remove the
/usr/lib/python2.7/dist-packages/django
directory and re-install Django.

The good people at growl provide the source code for growl on code.google.com and the binaries on the App Store. If you’re a cheapskate like me, you’ll save yourself 4 bucks and build the thing yourself.